Experimental dynamos: from models to applications to the geodynamo
Larmor proposed in 1919 an explanation for the origin of the Sun’s magnetic field. This phenomenon, known as the dynamo effect, is considered to be responsible for most of the magnetic fields of astrophysical objects, including that of the Earth. It took over 80 years after Larmor’s explanation for...
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Académie des sciences
2024-12-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.205/ |
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| author | Pétrélis, François |
| author_facet | Pétrélis, François |
| author_sort | Pétrélis, François |
| collection | DOAJ |
| description | Larmor proposed in 1919 an explanation for the origin of the Sun’s magnetic field. This phenomenon, known as the dynamo effect, is considered to be responsible for most of the magnetic fields of astrophysical objects, including that of the Earth. It took over 80 years after Larmor’s explanation for the first laboratory experiments to demonstrate the dynamo instability. After a brief introduction to the three experiments that have managed to observe this effect, I will describe what they have taught us about the possible regimes of dynamos of planets and stars, especially regarding the geodynamo. |
| format | Article |
| id | doaj-art-c41c128ae12d424ab0e442279286b124 |
| institution | Kabale University |
| issn | 1878-1535 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj-art-c41c128ae12d424ab0e442279286b1242025-02-07T13:54:24ZengAcadémie des sciencesComptes Rendus. Physique1878-15352024-12-0111710.5802/crphys.20510.5802/crphys.205Experimental dynamos: from models to applications to the geodynamoPétrélis, François0LPENS, CNRS, ENS Paris, PSL University, Sorbonne Université, Université de Paris, F-75005, Paris, FranceLarmor proposed in 1919 an explanation for the origin of the Sun’s magnetic field. This phenomenon, known as the dynamo effect, is considered to be responsible for most of the magnetic fields of astrophysical objects, including that of the Earth. It took over 80 years after Larmor’s explanation for the first laboratory experiments to demonstrate the dynamo instability. After a brief introduction to the three experiments that have managed to observe this effect, I will describe what they have taught us about the possible regimes of dynamos of planets and stars, especially regarding the geodynamo.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.205/Magnetohydrodynamicsdynamo instabilityreversals of the Earth’s magnetic field |
| spellingShingle | Pétrélis, François Experimental dynamos: from models to applications to the geodynamo Comptes Rendus. Physique Magnetohydrodynamics dynamo instability reversals of the Earth’s magnetic field |
| title | Experimental dynamos: from models to applications to the geodynamo |
| title_full | Experimental dynamos: from models to applications to the geodynamo |
| title_fullStr | Experimental dynamos: from models to applications to the geodynamo |
| title_full_unstemmed | Experimental dynamos: from models to applications to the geodynamo |
| title_short | Experimental dynamos: from models to applications to the geodynamo |
| title_sort | experimental dynamos from models to applications to the geodynamo |
| topic | Magnetohydrodynamics dynamo instability reversals of the Earth’s magnetic field |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.205/ |
| work_keys_str_mv | AT petrelisfrancois experimentaldynamosfrommodelstoapplicationstothegeodynamo |